eddy bowles is from new york city. >> firefighters are here in tribute to this young child and all the souls lost in this community. >> reporter: sandy hook's fire department also stood at attention for caroline previdi's funeral. she loved to draw and dance. family friend joseph secola. >> it's heartbreaking when you see a small casket. the girl is six years old but she was a lovely girl that gave joy to people and that's what they have to hold on to. >> reporter: charlotte bacon, the seventh student to be laid to rest since the shooting, was remembered for her love of animals and the color pink. and at teacher vicki soto's funeral the crowd was so large people stood outside. inside singer paul simon performed "sound of silence." ♪ the sound of silence... >> reporter: there's still no clear evidence as to what triggered adam lanza's rampage but, scott, the medical examiner is bringing in a geneticist to see if lanza might have had a medical condition that could have played a role at the shooting. >> pelley: at his news conference today the president said after all we've been through